JP2013117613A5

JP2013117613A5 - Camera system, interchangeable lens, and camera

Info

Publication number: JP2013117613A5
Application number: JP2011264778A
Authority: JP
Filing date: 2011-12-02
Publication date: 2015-01-15
Anticipated expiration: 2031-12-02

Description

本発明は、撮影レンズと、撮影レンズを装着可能なカメラ本体から構成されるカメラシ
ステム、交換レンズ、およびカメラに関する。 The present invention relates to a camera system , an interchangeable lens, and a camera including a photographic lens and a camera body to which the photographic lens can be attached.

本発明の目的は、上記問題を解決し、ＭＦ時に合焦位置付近でのピントの微調節を良好な操作性で行うことが可能であると共に、ＡＦ時に高精度なフォーカスレンズの駆動制御を行うことができるカメラシステム、交換レンズ、およびカメラを提供することにある The object of the present invention is to solve the above-mentioned problem, and to perform fine adjustment of the focus in the vicinity of the in-focus position during MF with good operability, and to perform high-precision focus lens drive control during AF. It is to provide a camera system , interchangeable lens, and camera that can

第２の発明に係るカメラシステムは、交換レンズと該交換レンズを装着可能なカメラ本体とから構成されるカメラシステムにおいて、前記交換レンズは、単位移動量に対する第１の像面移動量を有する第１の焦点調節レンズ群と、単位移動量に対する第１の像面移動量よりも小さい第２の像面移動量を有する第２の焦点調節レンズ群と、前記カメラ本体からの指示とに応じて前記第１の焦点調節レンズ群または前記第２の焦点調節レンズ群の駆動制御を行うレンズ駆動制御部と、を有し、前記カメラ本体は、前記第１の焦点調節レンズ群および前記第２の焦点調節レンズ群の焦点状態を検出して合焦位置を算出する焦点検出部を有し、前記レンズ駆動制御部は、前記カメラ本体からの指示された合焦位置に向けて前記第１の焦点調節レンズ群を駆動するとともに、その際に発生する前記第１の焦点調節レンズ群の停止位置と合焦位置のずれ量を算出し、算出した前記ずれ量に基づいて前記第２の焦点調節レンズ群の駆動制御を行うことを特徴とする。
第３の発明に係る交換レンズは、カメラ本体に装着可能な交換レンズにおいて、単位移動量に対する第１の像面移動量を有する第１の焦点調節レンズ群と、単位移動量に対して第１の像面移動量よりも小さい第２の像面移動量を有する第２の焦点調節レンズ群と、マニュアルフォーカスを行うためのＭＦ操作部と、前記ＭＦ操作部が操作された場合に、前記第１の焦点調節レンズ群または前記第２の焦点調節レンズ群を選択し、前記ＭＦ操作部の操作に応じて選択した前記第１の焦点調節レンズ群または前記第２の焦点調節レンズ群を駆動制御するレンズ駆動制御部と、を有することを特徴とする。
第４の発明に係るカメラは、複数の焦点調節レンズ群を有するカメラにおいて、単位移動量に対する第１の像面移動量を有する第１の焦点調節レンズ群と、単位移動量に対して第１の像面移動量よりも小さい第２の像面移動量を有する第２の焦点調節レンズ群と、マニュアルフォーカスを行うためのＭＦ操作部と、前記ＭＦ操作部が操作された場合に、前記第１の焦点調節レンズ群または前記第２の焦点調節レンズ群を選択し、前記ＭＦ操作部の操作に応じて選択した前記第１の焦点調節レンズ群または前記第２の焦点調節レンズ群を駆動制御するレンズ駆動制御部と、を有することを特徴とする。 A camera system according to a second invention is a camera system comprising an interchangeable lens and a camera body to which the interchangeable lens can be attached, wherein the interchangeable lens has a first image plane movement amount with respect to a unit movement amount. One focus adjustment lens group, a second focus adjustment lens group having a second image plane movement amount smaller than the first image plane movement amount with respect to the unit movement amount, and an instruction from the camera body A lens drive control unit that performs drive control of the first focus adjustment lens group or the second focus adjustment lens group, and the camera body includes the first focus adjustment lens group and the second focus adjustment lens group. A focus detection unit that detects a focus state of the focus adjustment lens group and calculates a focus position; and the lens drive control unit moves the first focus toward the focus position instructed from the camera body. Adjustment lens group Driving, and calculating a deviation amount between the stop position and the focusing position of the first focus adjustment lens group generated at that time, and driving control of the second focus adjustment lens group based on the calculated deviation amount It is characterized by performing.
An interchangeable lens according to a third aspect of the present invention is an interchangeable lens that can be attached to a camera body. When the second focus adjustment lens group having a second image plane movement amount smaller than the image plane movement amount, an MF operation unit for performing manual focus, and the MF operation unit are operated, One focus adjustment lens group or the second focus adjustment lens group is selected, and the first focus adjustment lens group or the second focus adjustment lens group selected according to the operation of the MF operation unit is driven and controlled. A lens drive control unit.
A camera according to a fourth aspect of the present invention is a camera having a plurality of focus adjustment lens groups, a first focus adjustment lens group having a first image plane movement amount with respect to a unit movement amount, and a first with respect to the unit movement amount. When the second focus adjustment lens group having a second image plane movement amount smaller than the image plane movement amount, an MF operation unit for performing manual focus, and the MF operation unit are operated, One focus adjustment lens group or the second focus adjustment lens group is selected, and the first focus adjustment lens group or the second focus adjustment lens group selected according to the operation of the MF operation unit is driven and controlled. A lens drive control unit.

本発明によれば、ＭＦ時に合焦位置付近でのピントの微調節を良好な操作性で行うこと
が可能であると共に、ＡＦ時に高精度なフォーカスレンズの駆動制御を行うことが可能な
カメラシステム、交換レンズ、およびカメラを提供することができる。
According to the present invention, it is possible to finely adjust the focus near the in-focus position during MF with good operability, and to perform high-precision focus lens drive control during AF. , Interchangeable lenses, and cameras can be provided.

Claims

In a camera system composed of an interchangeable lens and a camera body to which the interchangeable lens can be attached,
The interchangeable lens has a first focus adjustment lens group having a first image plane movement amount with respect to a unit movement amount, and a second image plane movement amount smaller than the first image plane movement amount with respect to the unit movement amount. A second focus adjustment lens group, an MF operation unit for performing manual focus, an operation of the MF operation unit and an instruction from the camera body, or the first focus adjustment lens group or the second focus adjustment lens group. A lens drive control unit that performs drive control of the focus adjustment lens group,
When the MF operation unit is operated in a state where the interchangeable lens is mounted on the camera body, the lens drive control unit is configured to perform the first focus adjustment lens group or the lens drive control unit according to an instruction from the camera body. A camera system, wherein a second focus adjustment lens group is selected, and the first focus adjustment lens group or the second focus adjustment lens group selected according to the operation of the MF operation unit is driven and controlled. .

The camera body includes a focus detection unit that detects a focus level, and the lens drive control unit is configured to detect the second focus adjustment lens when a focus level output from the focus detection unit exceeds a predetermined determination value. The camera system according to claim 1, wherein the lens drive control unit is instructed to select a group.

The camera body can set a plurality of operation modes, and when the operation mode having a smaller allowable depth is set, the lens drive control unit selects the second focus adjustment lens group. The camera system according to claim 1, wherein an instruction is given to a lens drive control unit.

In a camera system composed of an interchangeable lens and a camera body to which the interchangeable lens can be attached,
The interchangeable lens has a first focus adjustment lens group having a first image plane movement amount with respect to a unit movement amount, and a second image plane movement amount smaller than the first image plane movement amount with respect to the unit movement amount. A second focus adjustment lens group, and a lens drive control unit that performs drive control of the first focus adjustment lens group or the second focus adjustment lens group in accordance with an instruction from the camera body. ,
The camera body includes a focus detection unit that calculates a focus position by detecting a focus state of the first focus adjustment lens group and the second focus adjustment lens group,
The lens drive control unit drives the first focus adjustment lens group toward the in-focus position instructed from the camera body, and the stop position of the first focus adjustment lens group generated at that time And a driving amount of the second focus adjustment lens group is controlled based on the calculated shift amount.

In interchangeable lenses that can be attached to the camera body,
A first focus adjustment lens group having a first image plane movement amount with respect to a unit movement amount;
A second focus adjustment lens group having a second image plane movement amount smaller than the first image plane movement amount with respect to the unit movement amount;
An MF operation unit for performing manual focus;
When the MF operation unit is operated, the first focus adjustment lens group or the second focus adjustment lens group is selected, and the first focus adjustment lens selected according to the operation of the MF operation unit A lens drive control unit for driving and controlling the group or the second focus adjustment lens group;
An interchangeable lens comprising:

It has a mode setting part that can set multiple operation modes,
The lens drive control unit selects the second focus adjustment lens group when the operation mode set by the mode setting unit is set to an operation mode whose allowable depth is smaller than normal. The interchangeable lens according to claim 5.

In a camera having a plurality of focusing lens groups,
A first focus adjustment lens group having a first image plane movement amount with respect to a unit movement amount;
A second focus adjustment lens group having a second image plane movement amount smaller than the first image plane movement amount with respect to the unit movement amount;
An MF operation unit for performing manual focus;
When the MF operation unit is operated, the first focus adjustment lens group or the second focus adjustment lens group is selected, and the first focus adjustment lens selected according to the operation of the MF operation unit A lens drive control unit for driving and controlling the group or the second focus adjustment lens group;
A camera characterized by comprising:

A focus detection unit that detects the degree of focus of the plurality of focus adjustment lens groups;
8. The lens driving control unit according to claim 7, wherein the lens driving control unit selects the second focus adjustment lens group when the focus degree detected by the focus detection unit exceeds a predetermined determination value. camera.

The camera according to claim 8, wherein the predetermined determination value is set in association with a maximum value of a degree of focus detected by the focus detection unit.

It has a mode setting part that can set multiple operation modes,
The lens drive control unit selects the second focus adjustment lens group when the operation mode set by the mode setting unit is set to an operation mode whose allowable depth is smaller than normal. The camera according to claim 7.